Analog Interface

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Analog Interface

For maximum flexibility, the ADS7953EVM is designed for easy interfacing to multiple analog sources.

Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin,

dual-row, header/socket combination at P1. This header/socket provides access to the analog input pins

associated with CH0-CH7 of the ADS7953. Consult Samtec at http://www.samtec.com or call

1-800-SAMTEC-9 for a variety of mating connector options. Samtec part number TMS-108-02-G-D

provides access to analog input channels CH8-CH15 at J1.

Most of the pins on P1 and J1 are directly connected to the ADS7953 using a simple R/C filter with no

additional overvoltage protection circuitry. Use appropriate caution when handling these pins. Table 2 and

Table 3 summarize the pinouts for analog interfaces P1 and J1, respectively.

Table 2. Primary Analog Interface Pinout

Pin Number

Signal

Description

P1.2

CH7

CH7 input

P1.4

CH6

CH6 input

P1.6

CH5

CH5 input

P1.8

CH4

CH4 input

P1.10

CH3

CH3 input

P1.12

CH2

CH2 input

P1.14

CH1

CH1 input

P1.16

CH0

CH0 input

External reference source input (

– side of

P1.18

EXTREFN

differential input)

External reference source input (+ side of

P1.20

EXTREFP

differential input)

J9.15

Unused

—

P1.1-19 (odd)

AGND

Analog ground connections (except J1.15)

Table 3. Secondary Analog Interface Pinout

Pin Number

Signal

Description

J1.2

CH15

CH15 input

J1.4

CH14

CH14 input

J1.6

CH13

CH13 input

J1.8

CH12

CH12 input

J1.10

CH11

CH11 input

J1.12

CH10

CH10 input

J1.14

CH9

CH9 input

J1.16

CH8

CH8 input

J1.1-15 (odd)

AGND

Analog ground connections

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ADS79xxEVM and ADS79xxEVM-PDK

SLAU262C

– January 2009 – Revised May 2011

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